If you check out this page, it shows an example of the build sheet. It is the top left hand bax that has your build date of the car. Since I had your car before, your cowl plate says 04A which means it was built the first week of April. I also have a copy of your build sheet, and in the top left hand corner of your build sheet, it say 04-07. So, your car was built on April 7th of 1978.